Details.
Keratin hair straightening treatment includes a thorough wash with deep-cleansing shampoo, application of the keratin composition, drying after 20 to 30 minutes, and treatment with a hairdressing iron. The effect is maintained for 2 to 6 months, depending on hair porosity and curl level, and sulfate-free hair care products are recommended. The treatment is not recommended for people prone to allergic reactions or those with naturally scanty, curly hair.
